Answer:
Survey
Explanation:
Because if you think about it carefully you really cant observe it. Your main goal is to compare them and with that we need a survey to get the data from both sides. Leaving us with the Survey 
 
        
             
        
        
        
The answer is C. Producers make food which os then consumed then decomposers eat the remains.
        
                    
             
        
        
        
Answer:
That they lack true leaves and roots I hope this helps you! :D
 
        
             
        
        
        
Ecotourism 
d. increases biodiversity by providing income to areas that might otherwise be destroyed 
Explanation:
Ecotourism refers to visiting of  undisturbed natural areas.
 Ecotourism  is different from other tourism on the fact that it does not involve visit to an area which is  maintained by humans.
Ecotourists spots are allowed to grow naturally so that they can drag people who really want to enjoy the nature.
Ecotourist spots are protected areas and taxes are levied on them.  
Ecotourist spots call for tourists and gives native people ,a way of earning.
This forces the people to maintain these spots and hence biodiversity is conserved.
 
        
             
        
        
        
It helps the frog adapt to certain environments as a camouflage.